Extraction drier



Nov. 6, 1951 J. T. BIAN EXTRACTION DRIER Filed Ndv. 1, 1947 2SHEETSSHEET l 1951 J. T. BIAN 74,

EXTRACTION DRIER Filed Nov. 1, 1947 2 SHEETS-SHEET 2 Patented Nov. 6,1951 EXTRACTION DRIER:

John T; Bian, Chicago, Ill., assignor to thepartnership composed: ofJohn T. Bian, Anthony Zwissig; William. J. Spcllman, Burton. H.Williams, Ernest..Booth, and Thomas V. Mc-

Davitt Application'November 1, 1947, Serial No. 783,509 4 Claims. (01..219-19.)

This invention relates to a drier and more par ticularly to adryingmeans for drying a printed web of paper as it comes off a rotary press."

In the operation of modern high speed rotary presses, a web of paper isprinted upon both sides and then passed immediately to a folding orcutting machine. In the folding or cutting operation sheets are piledone upon the other-and diiliculty has been experienced in that the wetink on the paper tends to smudge. The methods employed for drying theink generally consist of a line of gas flames over'which' the paper ispassed rapidly and the ink flash dried. Any-maladjustment of the speedof thepaperover the flame or the intensity of the flame, results ineither poor drying of the ink or in overdrying', even to the extent ofigniting the paper; Infact, fires'are extremel common in press rooms.

I have invented" and am herein disclosing and claiming a novel means andmethod for drying printed paper which comprises, broadly; passing themoving web through an open ended. boxlike heating chamber and subjectingthe web to radiant heat on both sides as it passes through the chamber.

The invention will be described as disclosedin.

the embodiment shown in the accompanying drawings in which Fig. 1 is adiagrammatic view of the drier and a portion of a rotary press. Fig. 2is a vertical section through the drier and Fig. 3 is a horizontalsection along line 33 of Fig. 2.

Referring now to the drawings, It] indicates a drier through which amoving web of printed paper i I is passed after coming from drums l2 andE3 of a rotary press. opposite ends of the drier l serve to align theweb for its passage through the drier. Additional rollers it, I! and I8conduct the dried web to a folding or cutting machine (not shown). Thedrier IE3 is an open ended boxlike chamber having side walls [9 and topand bottom walls and 2|. The walls are insulated with suitableinsulating material 22 whose interior side is covered with a reflectingmeans 23 such as tinfoil. The web ll enters the drier through the openend 24 and leaves through the end 25 which is partially closed by anupstanding end wall 26 forming a pocket 21 immeditely interior of theend wall.

Shortly after entering the entrance 24, the upper surface of the web issubjected to radiant heat from a first heater 28. The heater extendstransversely across the entire chamber l0 and comprises a pair of spacedparallel electrical resistance elements 29 and 30. A copper screen 3| isattached to the heating elements 29 and 30 Guide rolls l4 and I5 at theweb to apply heat to the under side thereof.

The second heating element comprises three electrical resistanceelements 33, 34 and 35. The elements'33 and 34 are positioned relativeto each. other to form a V as shown while the third element, 35, islocated adjacent the exit 25. A secondcopper screen 35' is connected toall three elements. The screen 36 has its front edge immediately beneaththe rear edge of the heating element 3!) so that it forms a radiant heatmember in the shape shown, which is analogous to a truncated V. Thevarious heating elements receive their energy through conduits 3'! whichare connected with a sixty ampere magnetic relay 38 in turn connected toa sixty ampere fused switch 39 and then by conduits 40 to a 230 voltline (not shown). A manually operable switch 4| is provided in thecircuit.

If desiredpthe web exiting from the heating means may be air-wiped bymeans of the perforated pipe 42 connected by means of the pipe 43 to asource of compressed air.

In the installation made, the drier was positioned very close to thelast rollers of the press, the distance from the entrance 24 to therolls 1! and [3 being approximately 36 inches. The length of the chamberwas 64 inches and its overall height 9 inches. The outside width of thechamber was '74 inches. The copper conducting screens together with theresistance elements were approximately one inch from the insulation 23.The copper screens were therefore approximately two and one-half inchesfrom the web and were 16 gauge and one-half inch mesh. The temperaturebeneath the first heating element 28 was maintained at approximately F.while the temperture at the center of the drier was held at F. In thepocket 21 the temperature reached 230 F. The printed Web travelled at arate of 450 feet per minute and during its passage through the drier theink was dried to a degree which permitted subsequent cutting and foldingwithout smudging the ink. The temperatures may be varied somewhat withchanges in the speed of the paper and the particular ink being dried.

An important and additional advantage of the use of my drier is that iteliminates practically all of the static electricity with which thepaper has been charged during its passage through the press. Staticelectricity causes the printed web to stick during the cutting andfolding operations While I have shown and described my inven tion in itspreferred embodiment, it is to be un. derstood that it is capable ofmany modifications.

Changes, therefore, in the construction and arrangement may be madeWithout departing from the spirit and scope of the invention asdisclosedin the appended claims. j Having described my invention, I claim: 1. Adrying means for drying a moving printed web from a printing presscomprising an open ended chamber through which the web passes, a firstheated element within the chamber above the web and a second heatedelement within the chamber and below the web, said heated elementscomprising foraminous members extending transversely across the path ofthe moving web, electrical heating members contactingsaid elements alongtheir margins for heating the same and an upstanding end wall at theexit end of said chamber adapted to form a pocket of air having a highertemperature than the balance of air in the chamber adjacent said exitend, said web being unsupported during its passage through the chamberwhereby both faces of the web are entirely exposed to radiant heat fromsaid elements.

2. A drying means for drying inkon a moving printed continuous web froma printing press comprising a chamber having a top, a bottom, andsidewalls, and having open ends, means for passing the web through thechamber from end to end, a foraminous element in the chamber above theWeb, a second foraminous element in the chamber beneath the web, meansfor heating the marginal edges'of the elements, said elements being heatconductors and each'of said elements being wider than the web andextending across the chamber from side to side, said Web beingunsupported during its passage through the chamber whereby both faces ofthe web are entirely exposed to radiant heat from said elements.

4 3. A drying means for drying ink on a moving printed continuous webfrom a printing press comprising a chamber having a top, a bottom,

and sidewalls, and having open ends, means for passing the web throughthe chamber, said web being substantially unsupported during its passagefrom endtoend of the chamber, a metallic screen in the chamber above theweb, a metallic screen in the chamber beneath the web, each of saidscreens being wider than the web and extending across the chamber fromside to side and electrically heated members in contact only with themarginal edges of the screens for heating the screens by conduction ofheat therefrom whereby both faces of the Web are entirely exposed toradiant heat from said elements.

4. Apparatus of the character described in claim 3 in which said firstscreen is substantially rectangular in shape and said second screen isin the shape of a V, and in which said electrically heated members arein the form of relatively narrow strips contacting the marginal edges ofthe screens.

JOHN T. BIAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Date Number Name v 1,178,556 Tompkins Apr. 11,1916 1,401,303 Baldwin Dec. 27, 1921 1,421,166 Cannon June 27, 19221,484,324 Emerson Feb. 19, 1924 1,580,957 Chafie et al. Apr. 13, 19261,656,709 Kelley Jan. 17, 1928 1,656,824 Marans Jan. 17, 1928 1,741,882.Robinson Dec. 31, 1929 1,964,573 Hanson June 26, 1934 1,983,995Reinhardt Dec. 11, 1934 2,165,970. Jaspers July 11, 1939 2,445,443 LongJuly 20, 1948 2,508,357 Ames May 23, 1950 FOREIGN PATENTS Number CountryDate 187,739 Great Britain, Nov. 2, 1922

